Gear selecting and shifting executing mechanism for AMT (automated mechanical transmission)

Abstract

The gear selecting and shifting executing mechanism comprises a gear selecting air cylinder, the gear selecting air cylinder is connected with a gear selecting shaft, the gear selecting shaft is connected with a pin connecting block, the pin connecting block is connected with a gear selecting fork, the gear selecting fork comprises a U-shaped connecting section and a U-shaped fork foot, the U-shaped connecting section comprises a first U-shaped cavity, and the first U-shaped cavity is used for installing the pin connecting block in a matched mode; the U-shaped fork foot comprises a second U-shaped cavity, a gear shifting shaft is sleeved with the second U-shaped cavity in a matched mode, and the gear shifting shaft is connected with a gear shifting air cylinder. According to the gear selecting and shifting executing mechanism of the AMT, the gear selecting air cylinder and the gear shifting air cylinder are arranged in the 90-degree mode, the height difference exists in the height direction, the space occupied by the whole system is reduced to the maximum extent through the arrangement mode, and the compatibility of the gear selecting and shifting executing mechanism is improved to the maximum extent; the gear selecting and shifting executing mechanism can be matched with different transmission bodies, and the product serialization design from a 10-gear AMT transmission to a 20-gear AMT transmission is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts, and relates to AMT transmission, concretely relates to a gear selecting and shifting actuator for AMT transmission. BACKGROUND

[0002] AMT (Automated Manual Transmission) transmission as the automatic transmission form of current heavy commercial vehicle has occupied more and more important share in the market.And the gear shifting actuator as the core part of AMT transmission plays an important role.At present, the gear shifting actuator mainly has two kinds, gear selecting and shifting mode and parallel shaft form.Due to the complex road conditions in China, the multi-gear heavy AMT transmission is relatively widely used, so the gear selecting and shifting actuator is more used. SUMMARY

[0003] In view of the existing problems in the prior art, the utility model provides a gear selecting and shifting actuator for AMT transmission to solve the technical problem that the gear selecting and shifting actuator in the prior art does not match different transmission bodies.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize:

[0005] A gear selecting and shifting actuator for AMT transmission, comprising a gear selecting cylinder, wherein the gear selecting cylinder is connected with a gear selecting shaft, the gear selecting shaft is connected with a pin connecting block, and a through hole is formed in the pin connecting block.

[0006] Further comprising a gear selecting fork, the gear selecting fork comprising a U-shaped connecting section, the U-shaped connecting section comprising a first bottom wall in the shape of a cuboid, first side walls arranged at both ends of the short side of the first bottom wall respectively, a first U-shaped cavity with an open upper end and penetrating front and back being surrounded by the first bottom wall and the two first side walls, and gear selecting fork holes being respectively formed in the two first side walls.

[0007] The first U-shaped cavity is used for cooperating with the installation of the pin connecting block, the pin is installed in the gear selecting fork hole and the through hole, and the gear selecting cylinder can push the U-shaped connecting section to rotate.

[0008] The lower surface of one side of the short side of the first bottom wall is fixedly connected with the upper surface of the frustum bottom wall of the U-shaped fork leg perpendicularly, the length of the upper surface of the frustum bottom wall is less than the length of the lower surface, the upper surface of the frustum bottom wall is in the shape of a rectangle, second side walls are arranged at both ends of the short side of the upper surface of the frustum bottom wall respectively, and the rotation of the U-shaped connecting section drives the rotation of the U-shaped fork leg.

[0009] Further comprising a shift shaft, the shift shaft is connected with the shift cylinder, the shift cylinder is vertically arranged with the shift cylinder, and two shift shaft rotation recessed sections and a shift shaft hinged section are independently arranged on the outer side wall of the shift shaft, the two shift shaft rotation recessed sections are arranged between the shift cylinder and the shift shaft hinged section, and the two shift shaft rotation recessed sections are symmetrically arranged on the shift shaft.

[0010] The two second side walls and the conical bottom wall form a second U-shaped cavity which is open at the lower end and penetrates left and right, the upper end of the second U-shaped cavity is in a concave arc shape, and the second U-shaped cavity is used for cooperating with the installation of the shift shaft rotation recessed section, so that the rotation of the U-shaped fork leg drives the rotation of the shift shaft to select gears.

[0011] The utility model discloses further have the following technical features:

[0012] The length of the shift shaft rotation recessed section is greater than the length of the shift shaft hinged section.

[0013] The upper end of the first side wall is in a circular arc shape.

[0014] The second side wall comprises a clamping sleeve section and an external section which are sequentially connected, and the shift shaft rotation recessed section is cooperatively installed between the two clamping sleeve sections.

[0015] The U-shaped fork leg is located below the U-shaped connecting section, and the right side surface of the U-shaped fork leg is flush with the right side surface of the U-shaped connecting section.

[0016] The pin is provided with a clamping spring, and the clamping spring prevents the pin from falling off.

[0017] The distance between the two shift shaft rotation recessed sections is slightly smaller than the inner diameter of the second U-shaped cavity.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] (I) The shift selecting and shifting execution mechanism of the AMT transmission is arranged at an angle of 90° with the shift cylinder, and there is a height difference in the height direction, the arrangement maximizes the space occupation of the overall system, and the compatibility of the shift selecting and shifting execution mechanism can be maximized, the shift selecting and shifting execution mechanism can be matched with different transmission bodies, and the product serialization design from a 10-gear AMT transmission to a 20-gear AMT transmission is realized.

[0020] (II) The shift selecting and shifting execution mechanism of the AMT transmission selects gears by rotating the shift shaft, simplifies the design difficulty of the shift selecting and shifting execution mechanism, realizes the shift selecting and shifting operation with the least number of parts, and reduces the cost and failure rate of the product.

[0021] (III) The AMT transmission gear selecting and shifting actuator provided by the utility model has a reliable overall structure assembled and fixed by a mode, and does not have a riveting structure, so that the product is convenient to assemble and disassemble, and the maintenance is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the overall structure of the gear selecting and shifting actuator.

[0023] Figure 2 It is a schematic view of the sectional structure of the pin connecting position.

[0024] Figure 3 It is a schematic view of the structure of the gear selecting cylinder.

[0025] Figure 4 It is a schematic view of the structure of the gear shifting cylinder.

[0026] Figure 5 It is a schematic view of the structure of the gear selecting fork.

[0027] The meanings of the respective reference numerals in the drawings are as follows: 1-gear selecting cylinder, 2-gear selecting shaft, 3-pin connecting block, 4-through hole, 5-gear selecting fork, 6-pin, 7-gear shifting shaft, 8-gear shifting cylinder, 9-clamp spring.

[0028] 501-U-shaped connecting section, 502-first U-shaped cavity, 503-U-shaped fork leg, 504-second U-shaped cavity, 701-gear shifting shaft rotating inner recessed section, 702-gear shifting shaft hinged section.

[0029] 50101-first bottom wall, 50102-first side wall, 50103-gear selecting fork hole, 50301-tapered bottom wall, 50302-second side wall.

[0030] 5030201-clamp sleeve section, 5030202-outer connecting section.

[0031] The specific content of the utility model will be further explained and described in detail in combination with the embodiments. DETAILED DESCRIPTION

[0032] It should be noted that all the devices and parts in the utility model, if not specially stated, all adopt the devices and parts known in the prior art.

[0033] In accordance with the above technical solution, the specific embodiments of the utility model are given below, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical solution of the present application falls within the protection scope of the utility model.

[0034] Embodiment:

[0035] The embodiment provides a gear selecting and shifting actuator for an AMT transmission, which comprises a gear selecting cylinder 1, as shown in Figure 1 and Figure 3 The gear selecting cylinder 1 is connected with a gear selecting shaft 2, the gear selecting shaft 2 is connected with a pin connecting block 3, and a through hole 4 is formed in the pin connecting block 3.

[0036] As shown in Figure 1 and Figure 5 The gear selecting actuator further comprises a gear selecting fork 5, the gear selecting fork 5 comprises a U-shaped connecting section 501, the U-shaped connecting section 501 comprises a cuboid-shaped first bottom wall 50101, first side walls 50102 are arranged at both ends of the short side of the first bottom wall 50101, the first bottom wall 50101 and the two first side walls 50102 form a first U-shaped cavity 502 which is open at the upper end and penetrates through front and back, and gear selecting fork holes 50103 are respectively formed in the two first side walls 50102.

[0037] As shown in Figure 1 The first U-shaped cavity 502 is used for cooperating with the installation of the pin connecting block 3, and a pin 6 is arranged in the gear selecting fork hole 50103 and the through hole 4, so that the gear selecting cylinder 1 can push the U-shaped connecting section 501 to rotate.

[0038] As shown in Figure 1 and Figure 5 The lower surface of the short side of the first bottom wall 50101 is vertically and fixedly connected with the upper surface of a frustum bottom wall 50301 of a U-shaped fork leg 503, the length of the upper surface of the frustum bottom wall 50301 is less than the length of the lower surface, the upper surface of the frustum bottom wall 50301 is in a rectangular shape, second side walls 50302 are arranged at both ends of the short side of the upper surface of the frustum bottom wall 50301, and the rotation of the U-shaped connecting section 501 drives the rotation of the U-shaped fork leg 503.

[0039] As shown in Figure 1 and Figure 4 The gear selecting actuator further comprises a gear shifting shaft 7, the gear shifting shaft 7 is connected with a gear shifting cylinder 8, the gear selecting cylinder 1 and the gear shifting cylinder 8 are vertically arranged, two gear shifting shaft rotating concave sections 701 and a gear shifting shaft hinged section 702 are independently formed in the outer side wall of the gear shifting shaft 7, the two gear shifting shaft rotating concave sections 701 are located between the gear shifting cylinder 8 and the gear shifting shaft hinged section 702, and the two gear shifting shaft rotating concave sections 701 are symmetrically arranged on the gear shifting shaft 7.

[0040] As shown in Figure 1 and Figure 4 The two second side walls 50302 and the frustum bottom wall 50301 form a second U-shaped cavity 504 which is open at the lower end and penetrates through left and right, the upper end of the second U-shaped cavity 504 is in a concave arc shape, the second U-shaped cavity 504 is used for cooperating with the installation of the gear shifting shaft rotating concave section 701, and the rotation of the U-shaped fork leg 503 drives the rotation of the gear shifting shaft 7 to select gears.

[0041] As a preferred scheme of the embodiment, as shown in Figure 1 and Figure 4 The length of the rotation recessed section 701 of the shift shaft is greater than the length of the hinge section 702 of the shift shaft.

[0042] As a preferred scheme of the embodiment, as shown in Figure 1 and Figure 5 The upper end of the first side wall 50102 is in the shape of a circular arc.

[0043] As a preferred scheme of the embodiment, as shown in Figure 1 and Figure 5 The second side wall 50302 comprises, in sequence, a sleeve section 5030201 and an external section 5030202, and the rotation recessed section 701 of the shift shaft is fitted between the two sleeve sections 5030201.

[0044] As a preferred scheme of the embodiment, as shown in Figure 1 and Figure 5 The U-shaped fork 503 is located below the U-shaped connecting section 501, and the right side surface of the U-shaped fork 503 is flush with the right side surface of the U-shaped connecting section 501.

[0045] As a preferred scheme of the embodiment, as shown in Figure 2 The pin 6 is provided with a snap spring 9, which prevents the pin 6 from falling off.

[0046] As a preferred scheme of the embodiment, as shown in Figure 1 and Figure 5 The distance between the two rotation recessed sections 701 of the shift shaft is slightly less than the inner diameter of the second U-shaped cavity 504.

[0047] In the embodiment, the design scheme of the shift selection actuator for the AMT transmission is as follows:

[0048] (1) The stroke of the shift cylinder 8 is determined according to the shift stroke of the AMT transmission, and it is ensured that the movement of the shift shaft 7 does not interfere with the selection fork 5 under the stroke.

[0049] (2) The stroke and diameter of the selection cylinder 1, and the shaft spacing between the selection cylinder 1 and the shift cylinder 8 are designed according to the selection force and the rotation angle of the selection.

[0050] (3) According to the actual arrangement of the actuator, a reasonable pin 6 assembly position is designed on the selection shaft 2, and two rotation recessed sections 701 are designed on the shift shaft 7, which cooperate with the selection fork 5.

[0051] In the embodiment, the working process of the shift selection actuator for the AMT transmission is as follows:

[0052] The selection cylinder 1 moves the selection shaft 2 axially, the selection shaft 2 moves the selection fork 5 to rotate, the selection fork 5 rotates the shift shaft 7 to select, and then the shift cylinder 8 moves the shift shaft 7 axially to shift.

Claims

1. A selection and shift actuator for an AMT transmission, comprising a selection cylinder (1), the selection cylinder (1) being connected with a selection shaft (2), the selection shaft (2) being connected with a pin connecting block (3), the pin connecting block (3) being provided with a through hole (4), characterized in that: further comprising a selection fork (5), the selection fork (5) comprising a U-shaped connecting section (501), the U-shaped connecting section (501) comprising a cuboid-shaped first bottom wall (50101), the first bottom wall (50101) being provided with a first side wall (50102) at each end of the short side, the first bottom wall (50101) and the two first side walls (50102) surrounding a first U-shaped cavity (502) which is open at the upper end and penetrates from front to back, and the two first side walls (50102) being respectively provided with a selection fork hole (50103); the first U-shaped cavity (502) being used for cooperating with the installation of the pin connecting block (3), the selection fork hole (50103) and the through hole (4) being provided with a pin (6) for installation, so that the selection cylinder (1) can push the U-shaped connecting section (501) to rotate; the lower surface of the short side of the first bottom wall (50101) being vertically and fixedly connected with the upper surface of the frustum bottom wall (50301) of the U-shaped fork leg (503), the length of the upper surface of the frustum bottom wall (50301) being less than the length of the lower surface, the upper surface of the frustum bottom wall (50301) being rectangular in cross section, the two ends of the short side of the upper surface of the frustum bottom wall (50301) being respectively provided with a second side wall (50302), the U-shaped connecting section (501) driving the U-shaped fork leg (503) to rotate; further comprising a shift shaft (7), the shift shaft (7) being connected with a shift cylinder (8), the selection cylinder (1) and the shift cylinder (8) being vertically arranged, the outer side wall of the shift shaft (7) being respectively and independently provided with two shift shaft rotating concave sections (701) and a shift shaft hinged section (702), the two shift shaft rotating concave sections (701) being located between the shift cylinder (8) and the shift shaft hinged section (702), the two shift shaft rotating concave sections (701) being symmetrically arranged on the shift shaft (7); the two second side walls (50302) and the frustum bottom wall (50301) surrounding a second U-shaped cavity (504) which is open at the lower end and penetrates from left to right, the upper end of the second U-shaped cavity (504) being concave arc-shaped, the second U-shaped cavity (504) being used for cooperating with the installation of the shift shaft rotating concave section (701), so that the rotation of the U-shaped fork leg (503) drives the shift shaft (7) to rotate for selection. the length of the shift shaft rotating concave section (701) being greater than the length of the shift shaft hinged section (702).

2. The shift and select actuator for an AMT transmission of claim 1 wherein, the upper end of the first side wall (50102) being arc-shaped.

3. The shift and select actuator for an AMT transmission of claim 1 wherein, the second side wall (50302) comprising a sleeve section (5030201) and an external section (5030202) which are sequentially connected, the shift shaft rotating concave section (701) being cooperatively installed between the two sleeve sections (5030201).

4. The shift and select actuator for an AMT transmission of claim 1 wherein, ​ 5. The shift and select actuator for an AMT transmission of claim 1 wherein, The U-shaped fork leg (503) is located below the U-shaped connecting section (501), and the right side surface of the U-shaped fork leg (503) is flush with the right side surface of the U-shaped connecting section (501).

6. The shift and select actuator for an AMT transmission of claim 1 wherein, The pin (6) is provided with a snap spring (9), and the snap spring (9) prevents the pin (6) from falling off.

7. The gear selection and shift actuator for an AMT transmission of claim 1 wherein, The spacing between the two shift shafts rotating inner recessed sections (701) is slightly smaller than the inner diameter of the second U-shaped cavity (504).

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